From: Sean Christopherson <seanjc@google.com>
To: Vipin Sharma <vipinsh@google.com>
Cc: "Wang, Wei W" <wei.w.wang@intel.com>,
David Matlack <dmatlack@google.com>,
"andrew.jones@linux.dev" <andrew.jones@linux.dev>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 0/5] dirty_log_perf_test vCPU pinning
Date: Fri, 14 Oct 2022 19:02:54 +0000 [thread overview]
Message-ID: <Y0myXiIjlT8pYyr8@google.com> (raw)
In-Reply-To: <CAHVum0d2Jfr=WVxKxvnmwGKzPfV3vN5dbz11=rdcW6qoSoobew@mail.gmail.com>
On Fri, Oct 14, 2022, Vipin Sharma wrote:
> On Fri, Oct 14, 2022 at 9:55 AM David Matlack <dmatlack@google.com> wrote:
> >
> > On Fri, Oct 14, 2022 at 9:34 AM Sean Christopherson <seanjc@google.com> wrote:
> > >
> > > On Fri, Oct 14, 2022, Wang, Wei W wrote:
> > > > Just curious why not re-using the existing tools (e.g. taskset) to do the pinning?
> > >
> > > IIUC, you're suggesting the test give tasks meaningful names so that the user can
> > > do taskset on the appropriate tasks? The goal is to ensure vCPUs are pinned before
> > > they do any meaningful work. I don't see how that can be accomplished with taskset
> > > without some form of hook in the test to effectively pause the test until the user
> > > (or some run script) is ready to continue.
> >
> > A taskset approach would also be more difficult to incorporate into
> > automated runs of dirty_log_perf_test.
> >
> > >
> > > Pinning aside, naming the threads is a great idea! That would definitely help
> > > debug, e.g. if one vCPU gets stuck or is lagging behind.
> >
> > +1
>
> I also like the idea.
>
> Sean:
> Do you want a v6 with the naming patch or you will be fine taking v5,
> if there are no changes needed in v5, and I can send a separate patch
> for naming?
Definitely separate, this is an orthogonal change and I don't think there will be
any conflict. If there is a conflict, it will be trivial to resolve. But since
Wei provided a more or less complete patch, let's let Wei post a formal patch
(unless he doesn't want to).
next prev parent reply other threads:[~2022-10-14 19:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-10 22:05 [PATCH v5 0/5] dirty_log_perf_test vCPU pinning Vipin Sharma
2022-10-10 22:05 ` [PATCH v5 1/5] KVM: selftests: Add missing break between -e and -g option in dirty_log_perf_test Vipin Sharma
2022-10-10 22:05 ` [PATCH v5 2/5] KVM: selftests: Put command line options in alphabetical order " Vipin Sharma
2022-10-10 22:05 ` [PATCH v5 3/5] KVM: selftests: Add atoi_paranoid() to catch errors missed by atoi() Vipin Sharma
2022-10-10 22:05 ` [PATCH v5 4/5] KVM: selftests: Add atoi_positive() and atoi_non_negative() for input validation Vipin Sharma
2022-10-10 22:05 ` [PATCH v5 5/5] KVM: selftests: Run dirty_log_perf_test on specific CPUs Vipin Sharma
2022-10-20 21:42 ` Sean Christopherson
2022-10-20 21:44 ` Sean Christopherson
2022-10-14 15:12 ` [PATCH v5 0/5] dirty_log_perf_test vCPU pinning Wang, Wei W
2022-10-14 15:16 ` Wang, Wei W
2022-10-14 16:34 ` Sean Christopherson
2022-10-14 16:55 ` David Matlack
2022-10-14 18:26 ` Vipin Sharma
2022-10-14 19:02 ` Sean Christopherson [this message]
2022-10-14 21:21 ` Vipin Sharma
2022-10-17 0:47 ` Wang, Wei W
2022-10-20 21:46 ` Sean Christopherson
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